Back to the Future II: Today is the day that Marty McFly and Doc Brown travelled to 21 October 2015

But there still aren't any hoverboards...

Michael J Fox in Back to the Future (Universal/Everett/REX Shutterstock)

21 October 2015 marks the day that Marty McFly and Doc Brown travelled to in Back to the Future 2 – a world that the movie wrongly predicted would be filled with hoverboards and self-tying shoelaces.

In the sequel to the hugely popular Back to the Future, Marty McFly (played by Michael J Fox) used a time machine to reach Wednesday 21 October 2015 in order to save his own existence by altering the present and the future.

Fans of the cult classic have been celebrating the occasion – some with simple tweets, others with bizarre stunts.

Among the more imaginative events was in Belfast, where Doc Brown's legendary zip line ride from the clock tower of the fictional town Hill Valley was staged in the city where the DeLorean cars made famous by the film were made.

Dressed as the scientist (played by Christopher Lloyd), actor Gerard McCabe was seen whizzing from the Gasworks clock tower down Marty McFly – played by Dan Gordon - in a DeLorean below.

Directed by Robert Zemeckis - who was also behind classics such as Forrest Gump and Who Framed Roger Rabbit - some $40million dollars was spent on the film. It made a box office return of a staggering $332million.

Michael J. Fox and Christopher Lloyd were recently brought together to discuss what the film predicted.

“Can you believe we thought fax machines would still be around?” Fox tells Lloyd in the footage.